Vacuum brake booster

Details Vacuum brake booster Vacuum brake booster

1992-03-02

1993-03-02

Graham, Matthew C.

Brakes

Operators

Fluid pressure

605471, F16B 910

Patent

active

051901250

ABSTRACT:
A vacuum brake booster includes a secured arrangement for securing a flange portion of a control valve element to a cylindrical portion of the power piston so as to prevent relative movement between the flange portion of the control valve element and the power piston. Thereby, the seal surface of the control valve element is not urged toward the valve seat of the power piston by a pressure differential applied to the flange portion. The urging force of a second coil spring arrangement which urges the control valve element to separate from the valve seat in the non-operating condition of the vacuum brake booster is positively decreased without exerting an adverse influence to the control of the braking force of the vacuum brake booster (10). Accordingly, the input load of the vacuum brake booster is decreased and the operational feeling of the braking action is improved.

REFERENCES:
patent: 3362298 (1968-01-01), Julow
patent: 4325218 (1982-04-01), Weiler et al.
patent: 4394833 (1983-07-01), Weiler et al.
patent: 4447897 (1984-05-01), Boehm
patent: 4522031 (1985-06-01), Kytta et al.
patent: 4712468 (1987-12-01), Blot
patent: 4936635 (1990-06-01), Sakaguchi

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